<style>
    h1 {
        height: 100%;
        margin: 0;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    #img {
        width: 500px;
        height: 500px;
        display: block;
        margin: 30px auto;
    }
</style>
<div>
    <h1>欢迎来到雪月蛋糕管理系统</h1>
    <img id="img" src="../../img/雪月.png">
</div>
